Contact wafer



FIG. 1 is a top, front, and right side perspective view of a contact wafer showing our new design;

FIG. 2 is a bottom, back, and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the drawing views are included to show portions of the contact wafer that form no part of the claimed design. 

CLAIM The ornamental design for contact wafer, as shown and described. 